corey.gray@LIGO.ORG - posted 10:09, Tuesday 23 February 2016 - last comment - 11:55, Tuesday 23 February 2016(25677)
Optical Lever 7 Day Trends
Attached are 7 day pitch, yaw, and sum trends for all active H1 optical levers. Closing FAMIS #4393.
Notes:
- ETMy YAW has been trending down over the last 2 months (from around 0 to -7). If +/- 10 is our zeroing no-go, we might have another 3-4 weeks until we get to -10 and will needt to re-zero the yaw for this oplev.
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Comments related to this report
Everything here looks good. We need to keep an eye on the HAM2 oplev (assuming anyone is actually using it), it is getting close to the edge of its linear operating range (~±30 µrad).
We'll keep an eye on ETMy yaw as well. Its linear operating range is large (on the order of ±50 µrad) so a re-zeroing is strictly necessary, but it is used for weekly SUS charge measurements so a tighter operating range might be desirable.